Spin Hall effect induced Néel order switching in the tetragonal Mn 2 Au

This is the authors' abstract. We don't add key points for this paper.

Tetragonal Mn 2 Au is a metallic antiferromagnet with high Néel temperature well above 1000 K. The collinear magnetic sublattice with broken inversion symmetry in company with stable in-plane anisotropy in this material favors to control it via the Néel spin–orbital effect and spin-Hall effect. In this paper, we study the spin–orbital torque induced Néel order dynamics in the heavy-metal(HM)/Mn 2 Au system based on coupled Landau–Lifshitz-Gilbert-Slonczewski equations. We demonstrate robust picosecond switching of the Néel order of the Mn 2 Au in the presence of two charge currents, and close resemblance of the Néel order switching of the HM/Mn 2 Au bilayer to short-term plasticity and long-term potentiation observed in the biological synapses. Orders in magnitude reduction of the power consumption in the Pt/Mn 2 Au bilayer comparing with the ferromagnetic tunnel junction is demonstrated also. The ultra-high speed terahertz dynamics, ultra-lower power consumption accompanying with feasible electrical manipulation make HM/Mn 2 Au system a promising candidate in memory storage and neuromorphic computing applications.